Question

Помогите дурачку, дам 20 балов​

Answer 1

Объяснение:

смотри объяснение на фото

Answer 2

Ответ:

1) x = 0

2) x = {-3; 0}

3) x = 0

4) x = {0; 0,3}

5) x = {-0,5; 0,5}

6) x = {-3; 3}

7) x = {-9; 9}

8) x = {0; 9}

Объяснение:

1)

$4 {x}^{2} = 0 \\ {x}^{2} = 0 \\ x = 0$

2)

$5 {x}^{2} + 15x = 0 \\ x(5x + 15) = 0 \\ x 1= 0 \\ x 2= - 3$

3)

$\sqrt{3} {x}^{2} = 0 \\ {x}^{2} = 0 \\ x = 0$

4)

$20 {x}^{2} - 6x = 0 \\ x(20x - 6) = 0 \\ x1 = 0 \\ x 2= 0.3$

5)

$4 {x}^{2} - 1 = 0 \\ 4 {x}^{2} = 1 \\ {x}^{2} = \frac{1}{4} \\ x1 = \frac{1}{2} = 0.5 \\ x2 = - \frac{1}{2} = - 0.5$

6)

$9 - {x}^{2} = 0 \\ {x}^{2} = 9 \\ x 1 = 3 \\ x2 = - 3$

7)

${x}^{2} - 81 = 0 \\ {x}^{2} = 81 \\ x1 = 9 \\ x2 = - 9$

8)

$9x - {x}^{2} = 0 \\ x(9 - x) = 0 \\ x1 = 0 \\ x2 = 9$